Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 114 for “"cellular systems"”.
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Integrated cellular systems
… determined. Utilizing this new understanding, 3D cellular immobilization capabilities were extended using sol-gel matrices endowed with glycerol, trehalose, and media components. The effects of these additives, and the metabolic phase of encapsulated S. cerivisiase cells, on long-term viability …
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Biological building blocks for 3D printed cellular systems
Embargo set by: Colleen Fallaw for item 102581 Lift date: 2019-08-10T21:25:30Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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Distance estimation through wavefront curvature in cellular systems
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Modeling of nucleation-based stochastic processes in cellular systems
… allow us to probe the role of stochasticity in cellular processes. Stochastic modeling of the corresponding processes is thus an essential ingredient for the understanding and interpretation of cellular systems of interest. In this thesis, we explore several nucleation-based stochastic cellular …
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Electron-spin resonance oximetry in cellular systems and in vivo
… to measurement of oxygen concentrations in cellular suspensions as well as in vivo systems.
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Quantitative Measurements of Force Distribution in Single and Multi Cellular Systems
… and task in vivo. They form the extracellular matrix (ECM). The detailed quantitative evaluation of tissue construction and tissue-cell interaction is essential for a detailed understanding of organ development and its associated malfunctions which lead to different diseases. However, …
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Exploiting Spatial Degrees-of-Freedom for Energy-Efficient Next Generation Cellular Systems
… expected to be a primary goal in next generation cellular systems because it promises to reduce operating costs. The first key issue is energy efficiency of distributed antenna systems (DASs). The power consumption of high power amplifiers (HPAs) used in wireless communication systems is …
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Air interface standards for digital mobile cellular systems in the U.S., Europe and Japan
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Capacity Improvement Using Adaptive Sectorisation in WCDMA Cellular Systems With Non-Uniform and Packet Mode Traffic
CDMA cellular mobile systems find widespread acceptance particularly in regional centres where there are large geographical areas to cover. However, temporal changes of user density due to formation of congregated population centres (called hot spots) can seriously undermine the system design goals …
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Extracellular matrix stiffness and geometry: The impact on static and dynamic cellular systems in vitro and the treatment of tissue ischemia
… very important for biopharmaceutical industry. Cellular material for such applications can represent static cultures that do not change over time, or dynamic (i.e. transformational) cultures based on pulripotent cells undergoing “cellular metamorphosis” and differentiating into a multitude of …
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A study of parasitic cellular frequency reuse
Indoor parasitic cellular systems are in-building stand alone cellular networks that use the concept of simultaneously reusing the frequencies of cellular systems outside the building for wireless communications inside the building. The objective of this thesis is to provide an analysis to …
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Performance of GMSK and 7/4-DQPSK Modulations in Land Mobile Radio Channels
Cellular communication systems that provide telephone communication service to mobile users have experienced a rapid growth during the last five years. The current cellular systems are analog in nature. These systems employ frequency modulation. As the spectrum gets crowded, bandwidth efficient …
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COOPERATIVE COMMUNICATIONS FOR LTE-ADVANCED SYSTEMS: DOWNLINK RELAY AND PERFORMANCE OPTIMIZATION
… have been used to enhance coverage in commercial cellular networks, the use of more sophisticated fixed relays is relatively new. The main challenges faced by relay deployments in cellular systems are designing an improved and efficient relaying protocol, improving the desired signal and …
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Novel Adaptive Array Algorithms and Their Impact on Cellular System Capacity
… (AMPS) and Code Division Multiple Access (CDMA) cellular systems. Adaptive arrays have been proposed as early as in the 1960s to improve the signal quality, but most of its applications were restricted to defense purposes. Recently, there has been a surge in interest of applying adaptive arrays …
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A Network System Level Simulator for Investigating the Interworking of Wireless LAN and 3G Mobile Systems
… eventual convergence of wireless LAN (WLAN) and cellular systems in order to achieve the IMT-2000 (3G) requirement for 2 Mbps indoor capacities. The WLAN access point can be enhanced to either incorporate or supplant the transmission and packet data capabilities in the cellular network. This …
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Autonomous Link-Adaptive Schemes for Heterogeneous Networks with Congestion Feedback
… nodes to have dual connectivity. These emerging cellular networks are complex and large systems which are difficult to optimize with centralized control and where mobiles need to balance spectral efficiency, power consumption and fairness constraints. In this dissertation we focus on how …
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3D printing of biological machines for biology and medicine
… benefits and social implications of these systems are enormous. In health, biological machines can enhance tissues and organs by engineering a collection of cells to sense drug levels in the bloodstream, process it, and instruct secretory cells to counteract it. In security, ‘noses’ can be …
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